Luke Cafferty Luke Cafferty is a fitness junkie, personal trainer and blogger. He's passionate about living a healthy lifestyle and maintaining a strong and well-rounded physique, while inspiring others to do the same. Luke found a passion for human performance and the ability to optimize his nutritional intake for muscle growth, better immunity and different cardiovascular benefits at a young age. This passion has since grown and he continues to deepen his knowledge on all aspects of fitness and health. To see more of his work visit StrengthAuthority.com.